chore: improved README with functionality

README.md

@@ -20,18 +20,16 @@ Launch a Python shell, e.g., using:
 
 ```bash
 source venv/bin/activate
-python3
+python3 main.py -e
 ```
 
-Within the shell, type:
+This will only store the token locally in the secret storage, with minimal validation.
+To facilitate scripting, you can also pass the token as a quoted (!) string to the script, i.e like that:
 
-```python
-from main import enroll_token
-enroll_token("otpauth://totp/...")  # replace this with the URL you've gotten from the 2FA enrollment system
+```bash
+python3 main.py -e "otpauth://totp/..."
 ```
 
-This will only store the token locally in the secret storage, without any validation whatsoever.
-
 ## Get token
 
 ```bash